Module No. 1874
1874-1
GENERAL GUIDE
Stopwatch Mode
Countdown Alarm Mode
PA INTERVAL
PA
PA INTERVAL
PA
• Press C to change from mode to mode. Each mode is explained in detail on the
following pages.
• After you perform an operation in any mode, pressing C returns to the Timekeeping
Mode.
PA INTERVAL
PA
PA INTERVAL
PA
• While in any mode hold down C for 2 seconds, to enter the Dive Time Measurement
Mode.
24
A
24
A
RECALL AUTO SPL DATA
RECALL AUTO SPL DATA
Dive Time Measurement Mode
Hold down
Timekeeping Mode
Alarm Mode
PA INTERVAL
PA
A
C for 2
PA INTERVAL
PA
B
seconds.
PA INTERVAL
PA
24
A
P
P
24
A
D
C
RECALL AUTO SPL DATA
RECALL AUTO SPL DATA
Before Diving/Snorkeling
TIMEKEEPING MODE
• Be sure to check if the battery power is low (check for low light intensity or a dim
display). If it is, do not use the watch for diving/snorkeling.
• Make sure that the watch is set to the correct time of day.
• Check the glass, case and band for cracks or chips.
• In the Timekeeping Mode, press B to illuminate the
Day of week
Day
display.
Month
A
• Make sure that the band is fastened securely around your wrist.
To set the time and date
PA INTERVAL
PA
B
D
1. Press A while in the Timekeeping Mode. The seconds
digits flash on the display because they are selected.
2. Press C to change the selection in the following
sequence.
While Diving/Snorkeling
24
A
P
• Always use the “buddy system” when diving — never dive alone.
• Check to make sure that timer operation is being performed properly.
• Take care when diving/snorkeling near rocks or coral to avoid scratching the
watch.
C
RECALL AUTO SPL
Hour
Minutes
Seconds
12/24-Hour
Format
Minutes
Seconds
Hour
After Diving/Snorkeling
PM indicator
• To avoid corrosion, rinse your watch thoroughly with fresh water to remove salt
water, dirt, etc. (When possible, soak the watch in fresh water overnight to make
sure that all salt is removed.)
Day
Month
Year
3. While the seconds digits are selected (flashing), press D to reset them to 00. If you
press D while the seconds count is in the range of 30 to 59, the seconds are reset to
00 and 1 is added to the minutes. If the seconds count is in the range of 00 to 29, the
minutes count is unchanged.
4. While any digits (besides seconds) are selected (flashing), press D to increase the
selection. Holding down D changes the current selection at high speed.
The 12/24-hour setting is selected (flashing), press D to switch between the 12-hour
1( 2H) and 24-hour (24H) formats.
• With the 12-hour format, the P (PM) indicator appears to the left of the hour digits for
times in the range of noon to 11:59 pm and the A (AM) indicator appears to the left of
the hour digits for times in the range of midnight to 11:59 am.
• The 24-hour format is indicated by 24 on the display. Times are shown in the range of
00:00 to 23:59.
To use the Dive Time Measurement Mode
1. Before diving/snorkeling, switch to the Dive Time
Measurement Mode by holding down C for at least
Dive start time
two seconds.
A
PA INTERVAL
PA
2. To start the dive time measurement operation, press D.
3. To stop the measurement, hold down D for at least
one second (until the watch emits a long beep).
• At this time, timing of the surface interval starts. This
timing is performed internally, and it is not indicated on
the Dive Time Measurement Mode display. For details
on how to view surface interval data, see “To review log
data”.
B
D
24
A
C
RECALL AUTO SPL DATA
Dive time (hours,
minutes, seconds)
5. After you set the time and date, press A to return to the Timekeeping Mode.
• The day of the week is automatically set in accordance with the date.
• The date can be set within the range of January 1, 1995 to December 31, 2039.
• If you do not operate any button for a few minutes while a selection is flashing, the
flashing stops and the watch goes back to the Timekeeping Mode automatically.
Important!
Do not recall log data (to view the surface interval) while this procedure is in progress. If
you do, the dive time to that point will be stored into memory and the data will be cleared
when you re-start the dive time measurement operation.
4. To resume timing from the dive time shown on the display, press D.
• You can repeat steps 3 and 4 as many times as you like.
5. To clear the Dive Time Measurement Mode, stop the measurement operation (step 3,
above) and then press A.
About the backlight
The backlight uses an EL (electro-luminescent) panel that causes the entire display to
glow for easy reading in the dark. In the Timekeeping Mode or Dive Time Measurement
Mode, press B to illuminate the display for about two seconds.
• The electro-luminescent panel loses illuminating power after very long use.
• The illumination provided by the backlight may be hard to see when viewed under
direct sunlight.
To review log data
Log data can be reviewed (recalled) in the Timekeeping
Mode.
Surface interval
Dive start time
• The backlight automatically turns off whenever an alarm sounds.
1. Hold down C for at least two seconds to enter the
Timekeeping Mode from the Dive Time Measurement
Mode.
2. Hold down D to display the Log Data Display. The
Log Data Display remains visible as long as you hold
down D. When you release D, the normal
Timekeeping Mode display returns.
A
INTERVAL
PA
B
D
24
A
C
RECALL AUTO SPL DATA
Dive time
DIVE TIME MEASUREMENT MODE
The Dive Time Measurement Mode lets you measure the
Current time
To clear the log data memory
Log data in memory is automatically replaced by the
total time you spend underwater while diving or snorkeling,
and the amount of time spent on the surface (surface
A
newest measurement. Use the following operation if you
want to manually clear the log data memory.
INTERVAL
A
B
interval). The watch also stores one set of diving time
PA INTERVAL
PA
B
D
data (total dive time and dive start time) into log memory
for later recall.
• In the Dive Time Measurement Mode, press B to
illuminate the display.
24
A
24
A
1. While in theTimekeeping Mode, hold down D to display
the Log Data Display.
D
C
RECALL AUTO SPL DATA
C
RECALL AUTO SPL DATA
2. Press A to clear the log data memory. At this time, the
display clears so that no data is shown.
Precautions
[ Cleared Display ]
For your own safety, never operate the buttons of the
watch while underwater or while on the water’s
surface. Perform button operations in a safe place
after leaving the water.
Mode indicator
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